Sky and Telescope - June 2018 - 74
Mark Hanson, S. Mazlin, W. Keller, R. Parker, T. Tse,
P. Proulx (SSRO)
Often overshadowed by the Horsehead Nebula to
its west (outside the frame at top), this colorful mix
of blue reﬂection and reddish emission nebulae in
Orion surrounds the young star HD 37903.
DETAILS: RCOS 16-inch Ritchey-Chrétien telescope
with FLI PL16803 CCD camera. Total exposure:
38 hours through Astrodon LRGB ﬁlters.
J U N E 2 018 * SK Y & TELESCOPE